nao is an open-source framework for building analytics agents, organised around context engineering: deciding what an agent needs to know about a data warehouse before it can answer a question about it. Build, evaluation and deployment sit in the same tool.
Evaluation is the part that distinguishes it. An analytics agent that is right most of the time is useless without a way to establish which answers to trust, and most frameworks stop at generation.
Being open source means it can be self-hosted and inspected, which matters when the agent has access to a company’s data. The pricing page returns a 404, self-hosting is operational work, and agents answering data questions still need their output checked against the warehouse.
Key features
Analytics agent building framework
Context engineering as the organising idea
Evaluation of agent answers
Deployment included alongside build
Open source on GitHub
Screenshots & demo
Pricing
nao offers a free plan, with paid upgrades for higher limits and more features.
Pricing is provided as a guide. Check the official site for the latest plans.
Is nao expensive?
nao has no advertised paid tier. Among the 63 priced tools we list in Data and Analytics, the median entry price is $25 a month.
39% of Data and Analytics tools in the directory offer a free tier, and this is one of them.
Compared against every priced listing in Data and Analytics, recalculated as the catalogue changes. Method and the full market breakdown are in our AI tool pricing study.
Pros & cons
Pros
Evaluation built in rather than generation alone
Open source and self-hostable where data access matters
Covers build through to deployment
Cons
Pricing page returns a 404
Self-hosting is operational work you take on
Agent answers still need checking against the warehouse
nao is an open-source framework for building analytics agents, organised around context engineering: deciding what an agent needs to know about a data warehouse before it can answer a question about it.
Is nao free?
Yes, nao offers a free plan. Paid plans unlock more features and higher usage limits.
What are the best nao alternatives?
The closest matches in the directory are LLMStack, Promethium, and Vanna, compared side by side above.
Metabase AI answers natural-language questions on every tier – including the free, self-hosted open-source edition – with inspectable, verifiable queries.
